public class Test1 {
    public static void main(String[] args) {
        char ch = 'a';
        int a = Integer.parseInt(ch + " ");
        System.out.println(a);
    }
    public static void main1(String[] args) {
        String s = null;
        int a = Integer.parseInt(s);
        System.out.println(a);
    }
}
